diff --git a/types/index.d.ts b/types/index.d.ts
index b246bbe587..ccfad9d139 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -3024,6 +3024,7 @@ export declare namespace Knex {
     connectionTimeoutMillis?: number;
     types?: PgCustomTypesConfig;
     options?: string;
+    expirationChecker?(): boolean;
   }
 
   type PgGetTypeParser = (oid: number, format: string) => any;